CN221245659U - Spraying device - Google Patents

Abstract

The utility model discloses a spraying device, which belongs to the technical field of spraying equipment, and comprises a spray head, a liquid storage tank, a delivery pump, a spray head motor and a controller, wherein the liquid storage tank is used for storing liquid, one end of the delivery pump is communicated with the liquid storage tank, the other end of the delivery pump is communicated with the spray head, the spray head motor is connected with the spray head to drive the spray head to rotate, and the spray head motor is electrically connected with the controller to control the rotating speed of the spray head motor through the controller, so that the size of fogdrop particles sprayed by the spray head is adjusted. The spraying device can be used for spraying, sterilizing and killing public places or express cargoes, and can also be used for pesticide and fertilizer application and irrigation operation of agriculture and animal husbandry plants.

Description

Spraying device

Technical Field

The utility model relates to the technical field of spraying equipment, in particular to a spraying device capable of adjusting the size of atomized particles according to requirements.

Background

At present, the spraying device is widely applied, for example, the spraying device can be used for spraying and sterilizing public places, express articles, cargoes and the like, and also can be used for spraying and sterilizing protection or fertilizing irrigation of agriculture and animal husbandry plants.

In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: when spraying and killing large public places or spraying and applying pesticide, fertilizing and irrigating plants in large-scale farms or orchards, especially tall fruit trees, the spraying lift requirement is higher, and the spraying quantity requirement is higher, so that sprayed fog drop particles do not need to be too tiny, and the whole spraying work can be completed more quickly. When spraying operation is performed on small fruit trees, crops, pastures or express articles, common goods and the like, the spraying lift is low, sprayed fogdrop particles are required to be smaller, so that the spraying is uniform, and the waste of medicaments and the environmental pollution are not easy to cause. The existing sprayer generally adopts a traditional water pump to carry out pressurized transportation on liquid to realize spraying, the size of fog drops sprayed by the sprayer is fixed and single, flexible adjustment cannot be carried out according to actual demands, the liquid atomization effect is poor, and the liquid atomization effect is not fully utilized.

Therefore, the above technical problems need to be solved.

Disclosure of utility model

In order to overcome the defects of the prior art, the utility model provides a spraying device, which aims to solve the problem that a spraying machine in the prior art cannot flexibly adjust the particle size of sprayed fog drops according to actual demands.

In order to solve the technical problems, the basic technical scheme provided by the utility model is as follows: the utility model provides a atomizer, atomizer include shower nozzle, liquid reserve tank, delivery pump, shower nozzle motor and controller, and the liquid reserve tank is used for storing liquid, and the one end and the liquid reserve tank intercommunication of delivery pump, the other end and the shower nozzle intercommunication of delivery pump, the shower nozzle motor is connected with the shower nozzle in order to drive the shower nozzle and rotate, and the shower nozzle motor is connected with the controller electricity to make the rotational speed of controller control shower nozzle motor.

According to one embodiment of the utility model, a filter screen is arranged in the spray head.

According to an embodiment of the utility model, the filter screen is a metal mesh, a plastic mesh or a gauze.

According to an embodiment of the utility model, the controller is electrically connected to the delivery pump such that the controller controls the flow rate of the delivery pump.

According to an embodiment of the utility model, the spraying device further comprises a fan, the spray head is assembled on one side of an air outlet of the fan, and the fan is electrically connected with the controller.

According to an embodiment of the utility model, the spraying device further comprises an energy source mechanism, and the energy source mechanism is electrically connected with the controller.

According to an embodiment of the utility model, the energy source mechanism is a battery or a generator.

According to an embodiment of the utility model, the spraying device further comprises a mounting frame and a rotating table, the rotating table is provided with a support, the spray head is arranged on the support, and the rotating table is rotatably arranged on the mounting frame.

According to an embodiment of the utility model, the spraying device further comprises a telescopic rod, one end of the telescopic rod is directly or indirectly connected with the spray head, the spray head is rotatably arranged on the support, and the other end of the telescopic rod is connected with the support.

According to one embodiment of the utility model, the bottom of the mounting frame is provided with a moving wheel.

The beneficial effects of the utility model are as follows:

According to the technical scheme, the rotating speed of the motor of the spray head is controlled by the controller, so that the size of fogdrop particles sprayed by the spray head can be correspondingly adjusted. Specifically, the spray head rotates at a high speed under the drive of the spray head motor, the spray head generates a high-speed centrifugal force, and meanwhile, liquid in the liquid storage tank is conveyed to the spray head through the conveying pump and is sprayed out of the spray head under the action of the high-speed centrifugal force to form tiny fogdrop particles. The larger the rotating speed of the motor of the spray head is, the finer the fog drop particles sprayed out of the spray head are; otherwise, the smaller the rotating speed of the nozzle motor is, the larger the sprayed fog drop particles are. Therefore, the user can flexibly adjust the size of the fogdrop particles sprayed by the spraying device according to the actual use requirement.

Drawings

FIG. 1 is a perspective view of a spray device according to one embodiment of the present utility model;

FIG. 2 is an exploded view of a spray device according to one embodiment of the present utility model;

FIG. 3 is a schematic diagram of the assembly of a spray head and a spray head motor of a spray device according to one embodiment of the present utility model;

Fig. 4 is a cross-sectional view of the position A-A in fig. 3.

Reference numerals illustrate:

1-a spray head; 2-a liquid storage tank; 21-a case cover; 3-a transfer pump; 4-a nozzle motor; 5-a controller; 6-a first delivery tube; 7-a second delivery tube; 8-a fan; 9-an air duct; 10-a wind cylinder cover; 11-an energy mechanism; 12-control wires; 13-mounting rack; 131-mounting plates; 132-a first cover plate; 133-a second cover plate; 134-a moving wheel; 135-pushing hands; 14-a rotary table; 141-a bracket; 15-telescopic rod.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 and 2, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if the directions related to the embodiments of the present utility model are shown in the drawings, for example, the top and the bottom are shown in fig. 1, specifically, the top of fig. 1 is the top, and the bottom of fig. 1 is the bottom; meanwhile, as shown in fig. 2, the horizontal direction is approximately the left-right direction, and the vertical direction is the vertical direction in the drawing. If a particular gesture changes, the directional indication changes accordingly.

As shown in fig. 1 and 2, one embodiment of the present utility model provides a spraying device, which can spray liquid stored in the spraying device through a spray nozzle to form mist droplets, and is mainly used for spraying and sterilizing public places, express articles and cargoes, and spraying, sterilizing, fertilizing or irrigating agriculture and animal husbandry plants. Specifically, the spraying device includes a spray head 1, a liquid tank 2, a delivery pump 3, a spray head motor 4, and a controller 5.

The spray head 1 is a part for spraying liquid, and the spray head 1 is provided with a plurality of tiny liquid outlet holes, so that the liquid can be sprayed out through the liquid outlet holes of the spray head 1 under the action of pressure.

The liquid storage tank 2 is used for storing liquid. According to different use demands, the liquid stored in the liquid storage tank 2 can be water, or can be chemical agents, fertilizers and the like which take water or oil as solvents. The liquid storage tank 2 is provided with a tank cover 21, and a user can add liquid into the liquid storage tank 2 by opening the tank cover 21.

The delivery pump 3 is used to deliver the liquid in the reservoir 2 to the spray head 1. The nozzle motor 4 is connected with the nozzle 1 so that the nozzle motor 4 drives the nozzle 1 to rotate.

Specifically, as shown in fig. 2 to 4, the head motor 4 has an output shaft, the head 1 is substantially cylindrical, the center of the head 1 has an assembly hole for cooperation with the output shaft of the head motor 4, and the output shaft of the head motor 4 is inserted into the assembly hole inside the head 1, so that the head motor 4 and the head 1 are coaxially connected together, and the head motor 4 can drive the head 1 to rotate at a high speed. The inside of the one end that shower nozzle 1 kept away from shower nozzle motor 4 has the cavity, and shower nozzle 1's lateral wall has the feed liquor hole with the inside cavity intercommunication of self, and shower nozzle 1's lateral wall still is equipped with a plurality of tiny liquid holes that distribute along lateral wall circumference interval, all liquid holes all communicate with the inside cavity of shower nozzle 1. One end of the delivery pump 3 is communicated with the liquid storage tank 2 through a first delivery pipe 6, and the other end of the delivery pump 3 is communicated with a liquid inlet of the spray head 1 through a second delivery pipe 7.

When the delivery pump 3 and the nozzle motor 4 are started, the liquid in the liquid storage tank 2 can be delivered into the cavity in the nozzle 1 under the action of the delivery pump 3, and the liquid can be sprayed out through each tiny liquid outlet hole under the action of water pressure after entering the nozzle 1 from the liquid inlet hole of the nozzle 1; meanwhile, the spray head motor 4 also runs at a high speed, so that the spray head 1 is driven to rotate and generate a high-speed centrifugal force, so that liquid is sprayed from the spray head 1 and atomized to form tiny fogdrop particles under the action of the high-speed centrifugal force, atomization of the liquid is realized, the liquid can be sprayed out more uniformly, the consumption of the liquid is saved, and meanwhile, the environment pollution caused by excessive sprayed medicament is avoided.

In other embodiments, the spray head 1 may also have other reasonable structures, for example, the spray head 1 may be in a horn shape, and a plurality of tiny liquid outlet holes distributed at intervals are provided on the end surface of the spray head 1.

The controller 5 is electrically connected to the head motor 4 such that the controller 5 controls the rotational speed of the head motor 4. The control of the rotational speed of the motor of the spray head by the controller is known in the art, for example, from CN202316191U, which discloses a spray controller in which the rotational speed of the motor can be adjusted by pulse width modulation, thereby adjusting the pressure of the spray. In the embodiment of the utility model, the principle of centrifugal atomization is adopted, and the particle size of the fogdrops after liquid atomization depends on the centrifugal force generated when the spray head 1 rotates. The larger the rotating speed of the nozzle motor 4 is, the larger the centrifugal force generated by the rotation of the nozzle 1 is, and the finer the fog drop particles sprayed by the nozzle 1 are; conversely, the smaller the rotation speed of the nozzle motor 4, the smaller the centrifugal force generated by the rotation of the nozzle 1, and the larger the mist particles ejected from the nozzle 1. Like this, the user can be according to the rotational speed size of in-service use demand through controller 5 control shower nozzle motor 4 come nimble adjustment atomizer to spray the fog droplet granule size of fog droplet particle diameter's controllable, has solved the problem that atomizer can not adjust the fog droplet granule size of spraying among the prior art, reduces the bouncing and the loss waste of fog droplet granule on the target surface. The spraying device can be used for spraying and killing in public places, and spraying of plants in large farms or orchards, especially tall fruit trees, and spraying of small crops, pastures, express articles, cargoes and the like, so that the universality and the application range of the spraying device are enlarged.

In one embodiment of the utility model, the interior of the spray head 1 is provided with a filter screen. The filter screen can filter the liquid conveyed into the spray head 1 so as to block and intercept impurities or foreign matters in the liquid, and avoid faults caused by that some impurities and foreign matters in the liquid block the liquid outlet of the spray head 1. Optionally, the filter screen is detachably disposed inside the spray head 1, so as to clean the inside of the spray head 1 and replace the filter screen periodically.

In one embodiment of the utility model, the filter screen inside the spray head 1 is a metal mesh, a plastic mesh or gauze. In practical application, the filter screen with proper material can be correspondingly selected according to different properties of liquid stored in the liquid storage tank, cost or convenience in installation and replacement of the filter screen.

In one embodiment of the present utility model, the stirring rod is disposed inside the liquid storage tank 2, and the spraying device further includes a stirring motor, and the stirring rod is electrically connected to the stirring motor, so that the stirring motor drives the stirring rod to rotate. The stirring rod is used for stirring the liquid in the liquid storage tank 2 so as to uniformly stir the liquid such as chemical agents, fertilizers and the like in the liquid storage tank.

In one embodiment of the present utility model, the controller 5 is electrically connected to the delivery pump 3 such that the controller 5 controls the flow rate of the delivery pump 3. Through adopting controller 5 to control the flow of delivery pump 3, can carry the liquid ration in the liquid reserve tank 2 to shower nozzle 1, the user can be according to the accurate liquid flow who sprays of shower nozzle 1 of actual demand like this, avoids the waste of liquid and the pollution of environment.

In one embodiment of the present utility model, the spraying device further comprises a fan 8, the spray head 1 is assembled at one side of an air outlet of the fan 8, and the fan 8 is electrically connected with the controller 5. When the spraying device works, the fan 8 is started, and as the spray head 1 is assembled on one side of the air outlet of the fan 8, the fan 8 can blow the fog drops sprayed by the spray head 1 to a position at a longer distance. The rotating speed of the fan 8 can be controlled by the controller 5 to control the distance between the mist drops, specifically, the larger the rotating speed of the fan 8 is, the longer the sprayed mist drops are blown by the fan 8; conversely, the smaller the rotational speed of the blower 8, the closer the sprayed mist droplets are blown off by the blower 8. When spraying plants in large public places, large farms or orchards, especially high and big fruit trees, a user can adjust the rotating speed of the fan 8 to a larger gear through the controller 5, so that the spray droplets sprayed by the spray head 1 are far away and the spray lift is higher; when spraying small crops, pasture, express delivery and goods, the rotation speed of the fan 8 can be adjusted to be in a smaller gear by the controller 5, so that the spray drop distance sprayed by the spray head 1 is smaller, and the spray lift is lower. Through setting up fan 8, the user can be according to the accurate distance of adjusting the fog drop distance that shower nozzle 1 sprayed of actual demand, has improved atomizer operation's flexibility and commonality.

In an embodiment of the present utility model, the spraying device further includes a wind barrel 9, and the spray head 1, the spray head motor 4 and the fan 8 are all installed inside the wind barrel 9. As shown in fig. 1 and 2, the air duct 9 is a hollow cylinder, a through hole for the second conveying pipe 7 to pass through is formed in the bottom of the air duct 9, the spray head 1, the spray head motor 4 and the fan 8 are sequentially arranged along the axis of the air duct 9, the fan 8 is assembled at one end of the air duct 9, the spray head 1 and the spray head motor are coaxially assembled and then fixed in a cavity inside the air duct 9, the spray head 1 is positioned at one side of an air outlet of the fan 8, and the second conveying pipe 7 passes through the through hole in the bottom of the air duct 9 and is communicated with a liquid inlet of the spray head 1. Through setting up dryer 9, not only provide mounted position and supporting role for shower nozzle 1, shower nozzle motor 4 and fan 8, dryer 9 can also form the air-out passageway of fan 8 for the amount of wind that fan 8 blown out is concentrated along wind barrel 9 and is carried to shower nozzle 1 department, avoids the loss waste of amount of wind, has indirectly improved the dynamics that fan 8 blown off the fog drop.

In one embodiment of the present utility model, the transfer pump 3, the head motor 4, and the blower 8 are all electrically connected to the controller 5. That is, the controller 5 can control the flow of the delivery pump 3 and control the rotation speeds of the nozzle motor 4 and the fan 8, so that a user can control the size, the flow and the distance of the droplet particles sprayed by the nozzle 1 according to different requirements by controlling the controller 5, and the flexibility and the universality of the spraying device are greatly improved.

In an embodiment of the present utility model, the spraying device further includes a fan cover 10, where the fan cover 10 covers a side end surface of the fan 9 corresponding to an air inlet of the fan 8, and the fan cover 10 has a plurality of air inlet holes distributed at intervals, so that external air flows are sucked into the fan 8 through the air inlet holes of the fan cover 10. Through setting up wind barrel cover 10, can play the guard action to the shower nozzle 1 and the shower nozzle motor 4 of installing in dryer 9 inside on the one hand, on the other hand can block and intercept dust or other foreign matters in the air current, can prevent dust or foreign matter entering fan 8 inside to a certain extent and cause the fan trouble.

In one embodiment of the present utility model, the spraying device further comprises an energy source mechanism 11, and the energy source mechanism 11 is electrically connected to the controller 5. The energy source mechanism 11 provides a power source for the entire spraying device. As shown in fig. 1 and 2, the power source mechanism 11 is electrically connected to the controller 5 through a control wire 12, so that the delivery pump 3, the head motor 4, and the blower 8 can be started to operate under the control of the controller 5. Alternatively, the energy source mechanism 11 is a battery, such as a storage battery. Of course, in other embodiments, the spraying device may be directly electrically connected to an external power source or grid, thereby omitting the energy mechanism 11.

In one embodiment of the present utility model, the energy source mechanism 11 is a battery. Specifically, the energy source mechanism 11 may be a rechargeable battery, so that the spraying device can be reused only by charging the battery after the battery power is used. Alternatively, the energy source mechanism 11 may be a non-rechargeable battery, so that when the battery power is used, the spraying device is replaced with a new battery.

In one embodiment of the present utility model, the energy source mechanism 11 is a generator. The energy source mechanism 11 may be a gasoline or diesel generator, such that the generator is also capable of powering the transfer pump 3, the spray head motor 4, and the blower 8.

In one embodiment of the present utility model, the energy source mechanism 11 comprises a rechargeable battery and a solar power panel, the solar power panel is electrically connected with the rechargeable battery, and the rechargeable battery is electrically connected with the controller 5. The electric quantity generated by the illumination received by the solar power generation plate can be stored in the rechargeable battery, so that power energy is provided for the conveying pump 3, the spray head motor 4 and the fan 8. Such an energy mechanism 11 uses natural solar energy to generate electricity and provide power energy for the spraying device, and is energy-saving and environment-friendly.

In an embodiment of the utility model, the spraying device further comprises a mounting bracket 13 and a rotary table 14. The rotary table 14 is provided with a bracket 141, the nozzle 1 is provided on the bracket 141, and the rotary table 14 is rotatably mounted on the mounting frame 13. As shown in fig. 1 and 2, the mounting frame 13 has a square frame structure, and the top of the mounting frame 13 has a mounting plate 131, and the turntable 14 is rotatably mounted on the mounting plate 131 at the top of the mounting frame 13. The spray head 1 may be directly or indirectly provided on the bracket 141. For example, in the embodiment shown in fig. 1 and 2, the spray head 1, the spray head motor 4 and the blower 8 are all installed in the air duct 9, the air duct 9 is installed at the top end of the bracket 141, in other words, the spray head 1 is indirectly disposed on the bracket 141 through the air duct 9, and the rotary table 14 can rotate 360 ° in the horizontal direction with respect to the mounting frame 13. In other embodiments, the spray head 1 may be directly mounted on the top end of the bracket 141, and the rotary table 14 may be capable of rotating only 180 °, 90 °, or other angular ranges with respect to the mounting frame 13 in the horizontal direction. Thus, the direction and the angle range of the spray droplets sprayed by the spray head 1 can be adjusted in the horizontal direction by rotating the rotary table 14, and the flexibility and convenience of the operation of the spraying device are improved.

In one embodiment of the utility model, the inside of the mounting frame 13 is provided with a first cavity for placing the delivery pump 3, and the first cavity is provided with an opening communicated with the outside of the mounting frame 13 at a position corresponding to the side surface of the mounting frame 13; in order to protect the delivery pump 3 placed in the first cavity, the side of the mounting frame 13 is also provided with a first cover plate 132, the first cover plate 132 covering the opening of the first cavity. The inside of the mounting frame 13 is also provided with a second cavity for placing the energy source mechanism 11, and the second cavity is provided with an opening communicated with the outside of the mounting frame 13 at a position corresponding to the side surface of the mounting frame 13; in order to protect the energy source mechanism 11 placed in the second cavity, the side of the mounting frame 13 is further provided with a second cover plate 133, and the second cover plate 133 covers the opening of the second cavity. The interior of the mounting 13 also has room for the placement of the tank 2 and other components. In this way, all parts of the spraying device can be integrated on the mounting 13. In other embodiments, the mounting frame 13 may also have other shapes, for example, the mounting frame 13 includes a plurality of flat plates, and the liquid storage tank 2, the delivery pump 3, the energy source mechanism 11, the rotary table 14, and other components are respectively disposed on the respective flat plates, and all the components are integrally mounted on the mounting frame 13.

In an embodiment of the present utility model, the spraying device further includes a telescopic rod 15, one end of the telescopic rod 15 is directly or indirectly connected to the spray head 1, and the spray head 1 is rotatably disposed on the bracket 141, and the other end of the telescopic rod 15 is connected to the bracket 141. As shown in fig. 1 and 2, the spray head 1, the spray head motor 4 and the fan 8 are all installed in the air duct 9, two spaced connecting parts are arranged on the outer wall of the bottom of the air duct 9, one connecting part is pivotally connected to the top end of the bracket 141, the other connecting part is pivotally connected to one end of the telescopic rod 15, that is, one end of the telescopic rod 15 is indirectly connected to the spray head 1 through the connecting part of the air duct 9; the other end of telescopic link 15 is connected in the bottom of support 141, and like this when the length of telescopic link 15 is prolonged or is shortened, dryer 9 and inside shower nozzle 1 can rotate in vertical direction relative to support 141 to can adjust the direction and the angular range that shower nozzle 1 sprayed the droplet in vertical direction, improve atomizer operation's flexibility and convenience.

In one embodiment of the utility model, the bottom of the mounting 13 is provided with a moving wheel 134. For example, the moving wheels 134 may be installed at four positions spaced apart from the bottom of the mounting frame 13, respectively, so that a user can conveniently move the entire spraying device when spraying the plants, thereby improving the convenience of the operation of the spraying device. In other embodiments, the number of moving wheels 134 may be 6, 8, or other values, and the number of moving wheels 134 is not limited in the embodiments of the present utility model.

In one embodiment of the present utility model, a pushing hand 135 is provided on one side of the mounting frame 13, and a user can push the position of the pushing hand 135, thereby pushing the whole spraying device. By providing the pushing hands 135, the user can conveniently move the spraying device, and the spraying device is simple in structure and easy and convenient to operate.

In summary, the spraying device provided by the embodiment of the utility model can correspondingly adjust the size of the fogdrop particles sprayed by the spray nozzle 1 by controlling the rotating speed of the spray nozzle motor 4 through the controller 5; the flow rate of the liquid sprayed by the spray head 1 can be correspondingly controlled by controlling the flow rate of the delivery pump 3 through the controller 5; the rotating speed of the fan 8 is controlled by the controller 5, so that the distance between the fog drops sprayed by the spray head 1 can be correspondingly controlled, the liquid in the liquid storage tank 2 is fully utilized, and the spraying effect is better. In addition, the spraying device is further provided with a rotary table 14 and a telescopic rod 15, so that a user can flexibly adjust the direction angle of the spray head 1 for spraying mist drops in the horizontal direction and the vertical direction according to different requirements.

Variations and modifications to the above would be obvious to persons skilled in the art to which the utility model pertains from the foregoing description and teachings. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the utility model should be also included in the scope of the claims of the utility model. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.

Claims (10)

1. A spray device, comprising:

A spray head;

A liquid storage tank for storing liquid;

One end of the delivery pump is communicated with the liquid storage tank, and the other end of the delivery pump is communicated with the spray head;

the spray head motor is connected with the spray head to drive the spray head to rotate;

And the spray head motor is electrically connected with the controller, so that the controller controls the rotating speed of the spray head motor.

2. A spray device as claimed in claim 1, wherein the spray head has a filter screen disposed therein.

3. A spray device according to claim 2, wherein the filter mesh is a metal mesh, a plastic mesh or gauze.

4. A spraying device as claimed in claim 1, in which the controller is electrically connected to the delivery pump such that the controller controls the flow rate of the delivery pump.

5. A spraying device as claimed in any one of claims 1 to 4, further comprising a fan, the spray head being mounted to the air outlet side of the fan, the fan being electrically connected to the controller.

6. The spray device of claim 1, further comprising an energy source mechanism, said energy source mechanism being electrically connected to said controller.

7. A spray device as claimed in claim 6 wherein the energy source means is a battery or an electrical generator.

8. A spray device as claimed in any one of claims 1 to 4, 6 or 7, further comprising a mounting frame and a rotatable platform, the rotatable platform being provided with a support, the spray head being provided in the support, the rotatable platform being rotatably mounted to the mounting frame.

9. The spray device of claim 8, further comprising a telescoping rod, one end of the telescoping rod being directly or indirectly connected to the spray head, the spray head being rotatably disposed on the support, the other end of the telescoping rod being connected to the support.

10. A spraying device as claimed in claim 8, in which the base of the mounting frame is provided with a moving wheel.